+934 Let's call the amount of blue files x, so the amount of yellow files is 2x and the amount of red files is 3+x. The sum of these is 4x+3= 85. Solving for x, we get the amount of blue files as 20.5 which means there are x+3= 23.5 red files.
Since you can't have part of a file, I think there is something wrong with your question, the numbers don't add up correctly.
Hope it helps!
+934 Ok the questions is solvable now. Doing the same method above, there are x blue files, 2x yellow files, and x-3 red files. So 4x-3= 88 and x= 22. If there are 22 blue files then there are x-3= 19 red files.
Hope it helps!
+2095 You can see this answer:
Although the question is a little different, it has a good explanation.
